Question #15: Please answer the multiple choice question above. Thank you

You are working on a plan for social media marketing to supplement your family's traditional store advertising. Which of the following is not a tool for inbound marketing via social media? a. Posting how-to videos on YouTube b. Using search engine optimization to bring people to the store's website c. Posting information, photos, and videos to the store's blog d. Crowdsourcing product ideas through a special page on the store's website